﻿using Microsoft.Extensions.Caching.Memory;
using SqlSugar;
using System.Collections;
using System.Reflection;

namespace EU.Core.Extensions;

/// <summary>
/// 实现SqlSugar的ICacheService接口
/// </summary>
public class SqlSugarMemoryCacheService : ICacheService
{
    protected IMemoryCache _memoryCache;
    public SqlSugarMemoryCacheService(IMemoryCache memoryCache)
    {
        _memoryCache = memoryCache;
    }
    public void Add<V>(string key, V value)
    {
        _memoryCache.Set(key, value);
    }
    public void Add<V>(string key, V value, int cacheDurationInSeconds)
    {
        _memoryCache.Set(key, value, DateTimeOffset.Now.AddSeconds(cacheDurationInSeconds));
    }
    public bool ContainsKey<V>(string key)
    {
        return _memoryCache.TryGetValue(key, out _);
    }

    public V Get<V>(string key)
    {
        return _memoryCache.Get<V>(key);
    }

    public IEnumerable<string> GetAllKey<V>()
    {
        const BindingFlags flags = BindingFlags.Instance | BindingFlags.NonPublic;
        var coherentState = _memoryCache.GetType().GetField("_coherentState", flags).GetValue(_memoryCache);
        var entries = coherentState.GetType().GetField("_entries", flags).GetValue(coherentState);
        var cacheItems = entries as IDictionary;
        var keys = new List<string>();
        if (cacheItems == null) return keys;
        foreach (DictionaryEntry cacheItem in cacheItems)
        {
            keys.Add(cacheItem.Key.ToString());
        }
        return keys;
    }

    public V GetOrCreate<V>(string cacheKey, Func<V> create, int cacheDurationInSeconds = int.MaxValue)
    {
        if (!_memoryCache.TryGetValue<V>(cacheKey, out V value))
        {
            value = create();
            _memoryCache.Set(cacheKey, value, DateTime.Now.AddSeconds(cacheDurationInSeconds));
        }
        return value;
    }

    public void Remove<V>(string key)
    {
        _memoryCache.Remove(key);
    }
}
